Let's talk Transmissions

[fastd]

OP: Mine is the T56 Magnum with 2.66 first, .80 5th and .63 6th.

To xb-60, what ratio is the 1st gear on your toploader? the close ratio has a 2.32 first gear and the wide has 2.78. I generally agree with your speed is really like a 5 speed given your gearing; but I would still recommend a five speed; your 2.92 is a nice 60-70 gear but not really a cruise gear; if you a doing 75 on the highway for a decent stretch then a 5th gear would be nice.

[xb-60]

Originally Posted by fastd

OP: Mine is the T56 Magnum with 2.66 first, .80 5th and .63 6th.

To xb-60, what ratio is the 1st gear on your toploader? the close ratio has a 2.32 first gear and the wide has 2.78. I generally agree with your speed is really like a 5 speed given your gearing; but I would still recommend a five speed; your 2.92 is a nice 60-70 gear but not really a cruise gear; if you a doing 75 on the highway for a decent stretch then a 5th gear would be nice.

Reply to fastd....

It's a WR Toploader, so the 1st gear ratio is 2.78
So, in 1st gear, 1000rpm translates to 10mph (more than acceptable for my requirements).
Again, in 1st gear, 6000rpm translates to 60mph (again, perfectly happy with that).
In top 4th gear, 2500rpm gives me 70mph

(Tyres are 275/60x15)

I don't need a five speed gearbox, and which five and six speed 'boxes were available in the early '60s anyway?

Cheers!
Glen

[PCW]

Originally Posted by fastd

OP: Mine is the T56 Magnum with 2.66 first, .80 5th and .63 6th.

To xb-60, what ratio is the 1st gear on your toploader? the close ratio has a 2.32 first gear and the wide has 2.78. I generally agree with your speed is really like a 5 speed given your gearing; but I would still recommend a five speed; your 2.92 is a nice 60-70 gear but not really a cruise gear; if you a doing 75 on the highway for a decent stretch then a 5th gear would be nice.

Did you have any fit issues on install?

[xb-60]

Originally Posted by PCW

Did you have any fit issues on install?

Toploader is sitting here ready to fit....but not fitted yet.
Not anticipating any issues. Shifter position is period correct for 289. Hole in trans. tunnel already cut.

Happy Easter all!
Cheers
Glen

[fastd]

Originally Posted by PCW

Did you have any fit issues on install?

I didn’t do the install. Had it done by a shop in raleigh. They said that they didn’t have much of an issue but they did need to cut the tunnel.